Cathy and Jean had an equal number of mini cupcakes. After Cathy bought another 30 mini cupcakes and Jean bought another 6 mini cupcakes, Cathy had thrice as many mini cupcakes as Jean. Find the number of mini cupcakes that each of them had at first.
| |
Cathy |
Jean |
| Before |
3 u - 30 |
1 u - 6 |
| Change |
+ 30 |
+ 6 |
| After |
3 u |
1 u |
The number of mini cupcakes that Cathy and Jean had at first is the same.
3 u - 30 = 1 u - 6
3 u - 1 u = 30 - 6
2 u = 24
1 u = 24 ÷ 2 = 12
Number of mini cupcakes that each had at first
= 12 - 6
= 6
Answer(s): 6
